package com.atguigu.order;

import com.alibaba.cloud.nacos.NacosConfigManager;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;


import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
@EnableFeignClients
@EnableDiscoveryClient
@SpringBootApplication
public class OrderMainApplication {
    public static void main(String[] args) {
        SpringApplication.run(OrderMainApplication.class, args);
    }
    //1、项目启动就能监听配置文件的变化
    //2、发生变化后拿到变化值
    //3、发送邮件提醒
    @Bean
    ApplicationRunner applicationRunner(NacosConfigManager nacosConfigManager){
       return args -> {
           ConfigService configService = nacosConfigManager.getConfigService();
           configService.addListener("service-order.properties", "DEFAULT_GROUP", new Listener() {
               @Override
               public Executor getExecutor() {
                   return Executors.newFixedThreadPool(4);
               }

               @Override
               public void receiveConfigInfo(String s) {
                   System.out.println("配置文件变动："+s);
                   System.out.println("模拟发送邮件");

               }
           });
           System.out.println("==================");
        };
    }
}
